ASTM E2489-21(2026)

Detail information

Designation: ASTM E2489-21(2026)

Publication date: 01/05/2026

Pages: 13

Country: American technical standard

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Anotation

This practice describes methods for the statistical analysis of laboratory results obtained from interlaboratory proficiency testing programs. As in accordance with Practice E1301, proficiency testing is the use of inter-laboratory comparisons for the determination of laboratory testing or measurement performance. The methods provide direction for assessing and categorizing the performance of individual laboratories based on the relative likelihood of occurrence of their test results, and for determining estimates of testing variation associated with repeatability and reproducibility. Assumptions are that a majority of the participating laboratories execute the test method properly and that samples are of sufficient homogeneity that the testing results represent results obtained from each laboratory testing essentially the same material. Each laboratory receives the same instructions or protocol.


Keywords:
collaborative study, collaborative trial, interlaboratory comparison, interquartile range, proficiency testing, repeatability, reproducibility, Tukey fences,, ICS Number Code 71.040.40 (Chemical analysis)